Inverse optical torques on dielectric nanoparticles in elliptically polarized light waves

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yuzhi Shi
  • Tongtong Zhu
  • Ai Qun Liu
  • Lei-Ming Zhou
  • Manuel Nieto-Vesperinas
  • Amir Hassanfiroozi
  • Jingquan Liu
  • Zhenyu Li
  • Weiqiang Ding
  • Fan Wang
  • Hang Li
  • Qinghua Song
  • Xiaohao Xu
  • Baojun Li
  • Xinbin Cheng
  • Pin Chieh Wu
  • Che Ting Chan
  • Cheng-Wei Qiu

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Detail(s)

Original languageEnglish
Article number053902
Journal / PublicationPhysical Review Letters
Volume129
Issue number5
Online published28 Jul 2022
Publication statusPublished - 29 Jul 2022

Link(s)

Abstract

Elliptically polarized light waves carry the spin angular momentum (SAM), so they can exert optical torques on nanoparticles. Usually, the rotation follows the same direction as the SAM due to momentum conservation. It is counterintuitive to observe the reversal of optical torque acting on an ordinary dielectric nanoparticle illuminated by an elliptically or circularly polarized light wave. Here, we demonstrate that negative optical torques, which are opposite to the direction of SAM, can ubiquitously emerge when elliptically polarized light waves are impinged on dielectric nanoparticles obliquely. Intriguingly, the rotation can be switched between clockwise and counterclockwise directions by controlling the incident angle of light. Our study suggests a new playground to harness polarization-dependent optical force and torque for advancing optical manipulations.

Research Area(s)

Citation Format(s)

Inverse optical torques on dielectric nanoparticles in elliptically polarized light waves. / Shi, Yuzhi; Zhu, Tongtong; Liu, Ai Qun et al.
In: Physical Review Letters, Vol. 129, No. 5, 053902, 29.07.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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